Metal working – Electric condenser making – Solid dielectric type
Patent
1979-12-21
1981-10-13
Hall, Carl E.
Metal working
Electric condenser making
Solid dielectric type
29830, 200DIG1, 219 105T, 219 105R, 361280, H01G 430, H01H 926
Patent
active
042939879
ABSTRACT:
An improved technique for the manufacture of capacitive touch switch panel assemblies, utilized to control appliances and the like, provides simplified construction and manufacture. The technique involves the formation of conductive touch pads on one major surface of a dielectric panel and the formation of pairs of spaced-apart conductive pads and conductive lead members to the conductive pads on a separate flexible synthetic resin sheet. The synthetic resin is bonded to the opposite major surface of the dielectric panel with each pair of conductive pads on the synthetic resin sheet in registry with a corresponding touch pad on the one major surface of the dielectric panel. The synthetic resin sheet includes a portion having a conductive lead pattern formed thereon which is not bonded to the dielectric panel; this portion serves as a flexible connector for connection of the touch panel to a circuit board or the like. In one embodiment, the conductive lead pattern includes an interconnection pattern for circuit elements such as integrated circuits or display elements mounted on the synthetic resin sheet or the dielectric panel. The conductive lead pattern on the synthetic resin sheet may be a single-layer or a multi-layer pattern and the conductor may be formed from a single material or different materials having predetermined resistive characteristics whereby external resistors to the capacitive touch switches and/or circuit elements may be eliminated from the circuit.
REFERENCES:
patent: 3971013 (1976-07-01), Challoner et al.
patent: 4056699 (1977-11-01), Jordan
patent: 4149217 (1979-04-01), Tucker
Gottbreht Tom L.
Shepherd Glen C.
Hall Carl E.
Haug John A.
McAndrews James P.
Sharp Melvin
Texas Instruments Incorporated
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